I've gone through countless problems on my quest for a good setup: shredded/worn out belt, melted/worn rollers and sliders, leaned out piston and cylinder, hole in piston, ignition stator went out, air cooling assembly broke off, oil pump malfunctioning, kickstart slipping, and worst of all crank bearings wearing out which made the crank have play.
Well after the bearings going bad, I decided I needed to go deeper and do a complete bottom end rebuild with some other goodies, my goal being a streetable race/stroker setup.. o_o
Here is the full current modlist:
+52mm Ruima Racing cylinder
+42mm Racing ATV crank
with teflon spacers
+koyo 18k rpm bearings
+19mm Arreche carb 100main
+Unifilter airbox
+Polini carbonfiber reeds/cage
+PG short exhaust
+MRP Variator
+5.4g 15x12mm Rollers
+Malossi red Clutch springs
+Malossi yellow Torque driver
+Bando drive belt
+Vented tranny case
+custom spark plug boot
+NGK B9HS
+40:1 Premix with bluemarble
+New fan, shroud and
stator/flywheel assy.
+battery relocated to oiltank
+Koso Deluxe rpm and temp gauge
Pics - click to enlarge:
koso gauge
temp sensor at case
vented tranny case
PG pipe pic
battery relocation
fits in there perfectly
Polini CF reeds and cage
42mm atv race crank and bearings
pipe comparison
PG, stock, Next R
another view
MRP Variator
vari installed
new shroud and fan
need that cooling
arreche carb
nice and shiny
installed
engine comparison
ported 52mm-scored, stock 47mm-scored, new 52mm
The Results
I got everything together the day before college which is 16miles away. Boy was I suprised, got up close to 70MPH (thats about 113kmh) just on a straight after a slight uphill!! and thats with stock gearing, so you can try to imagine the acceleration factor.
Biggest difference on the top end was the mrp vari.Overall results are it can hold 50mph w/ about 1/4 throttle, and 55-60mph w/ half, with ample power at any speed. Jumped on the highway twice and kept up, even passed a few cars. Slight lag from a stop sometimes, but overall response is crisp w/ the cf reeds and power wheelies are easy even with stock clutch.
Being a stroker the engine gets too hot for my temp gauge to read so I relocated the sensor to the casing where it has a sweet spot of 158 F at WOT. Mileage isn't too bad at about 50-60mpg mixed riding.Thanks goes to Speedy for providing a huge amount of tuning advice and the exhaust! To Provo for the long due arrival of the arreche carb and belt. To Dave at strokeitimports for the the engine, crank and other parts. And to thescootercentral for the mrp vari, reedcage, and other parts as well. Lastly all those people out there with fast scoots who where my inspiration.
